Swivel rope-socket.



H. L. JARVIS, DEG'D. R. I.. unvls, Anmnls'raumx.

SWIVEL BOPB'SOOKE'I. APrLIoATIoN Hmm Nov. z, 1910.

Patented Mar. 12, 1912.

Jur

HERBERT L. JARVIS,

DECEASED, LATE OF IVICKITTRICK,

CALIFORNIA, BY ROSE LOUISE JARVIS, ADMINISTRATRIX, OF BAKERSFIELD,CALIFORNIA, ASSIGNOR OF ONE- THIRD TO JOHN IVI. SANDS, OF LOS A NGELES,CALIFORNIA, AND ONE-THIRD T0 GEORGE W. CHURCH, OF BAKERSFIEL'D,CALIFORNIA.

SWIVEL ROPE-SOCKET.

Specification of Letters Patent.

Patented Mar. 12, 1912.

Application filed November 2, 1910. Serial No. 590,255.

To all whom it may concern:

Be it known that I, Rose L. JARvis, administrat-rix of the estate ofHnnnna'r L. Janvis, deceased, late a citizen ot the United States,residing at McKittriek, in the count-y of Kern and State of California,do declare that the said Hiv-incitar L. Jnnvis did invent new and usefulImprovements in Swivel Rope-Sockets, of which the following is aspecification.

This invention relates to a swivel rope socket especially adapted t'orthe connection of a drilling line to the drilling tools in oil or otherwell work; and the object thereof is to provide a simple and reliablemechanism in which the cable may be easily and securely clamped andwhich will allow the tools hanging below to have a swiveling motion onthe cable.

Another object is to provide a resilient action so that the cable isrelieved from all sudden strains and shocks and the drilling madesmoother and more uniform.

In this improved device the usual end thrust bearing7 comprising ballsor rollers, is obviated and a simple resilient member placed in itsstead. The resilient member, in the form of a spring, affords thedesired elasticity of action and also allows the socket to etlect aswiveling motion without the necessity of any special bearing. Means areprovided for the easy and elticient clamping of the cable by making theclamping member in two halves and adapting it to be secured togetheraround the cable. By means of this construction the cable may be clampedtightly into place so that it is almost impossible for it to be pulledout.

In the accompanying drawings: Figure 1 is an elevation of the improvedsocket shown in connection with a cable and a string of drilling tools.Fig. 2 is a longitudinal section ot the same. Fig. 3 is a sectional viewof the inner cable clamping member. Fig. 4 is a cross section taken online 4,4 of Fig. 2.

In the drawings 5 designates an outer shell and mandrel provided with ahollow interior 6 in which cable clamping member 7 is placed. Cableclamping member 7 is made in two halves 8 which are secured together bya lierrule t) at. their upper end and by bolts l0 at their lower end.The upper end ot the cable clamping member is cylindrical as at ll,while the lower end is lluted as at l2. '.lbe upper cylindrical end ,llis reduced in size so as to pass through bore lil in the upper end o1mandrel The loweitinted end oit the cable clamping member lits movablyinto hollow interior (3 ot' the mandrel. A coiled spring 15 is placed inthe mandrel above the enlarged lower end of the cable clamping memberand around reduced portion l1. This spring tends to torce the cableclamping member down in the mandrel.

The cable clamping member is provided with a. central bore 2() which istapered and enlarged at 9.1 at its lower end. Cable 22 is placed in thiscentral bore, the cable having previously been expanded at its lower endby the insertion of a stalling into its interior at this point. Thehalves of the clamping member are clamped up around the cable so that itis then impossible to pull the cable up and ont ot the clamping member.One of the main 'features of this clamping member is the ease with whichthe cable may be extracted. In the ordinary socket the cable is pulledup tightly into place in a tapering bore and it becomes necessary todrive the cable out-an arduous process. In the socket herein disclosedthe clamping member may be loosened around the cable and the cableremoved without any ditliculty whatever.

To the lower end of mandrel 5 is joined a member 9.5 which connects witha string of drilling tools in the usual manner. Member 25 is providedwith an aperture Q6 leading from the interior hollow of the mandrel tothe outside so that any water or slush which may work into t-he mandrelmay pass ont freely. The llutings in the lower portion of the clampingmember also facilitates the passage of Such material. Portion 25 issquare to permit engagement by a wrench for turning and screwing thesocket to the string of tools.

In operating this device it will be seen that the cable is easily andeiioiently clamped in the socket andv released therefrom when it isdesired to make a change. lVhen drilling, upon each downward stroke ofthe tools, spring' 13 is compressed. The spring is suiioiently strong tocarry the weight of the tools under conditions of equilibrium and rest,but at the bottom of the stroke, when the tools are moving downwardlywith great momentum and when the cable is being retarded in its downwardmovement, the spring' is compressed and the tools strike the bottom ofthe hole on a resilient or springy movement. This is precisely what isdesired for eflioient and rapid drilling and .forkeeping the holestraight and otherwise in good condition.v

F rom the foregoing it will be seen that this invention consistsprimarily in these points; the provision of a resilient swivel action,whereby the tools are operated resiliently and are also allowed to turnso as to keep the hole truly cylindrical; and the provision of a simpleand eiiioient clamping means for the cable, so that the cable may beeasily placed in position and easily withdrawn when it is desired toChange the cable for any reason.

What is Claimed as new is:

A rope socket, comprising' a hollow mandrel having a longitudinal bore,a ropek clamp loosely arranged in said bore and having a substantiallycylindrical portion projecting out of the mandrel at its upper end, theclamp comprising two halves each having a longitudinal groove enlargedat one end, the lower parts of each half being provided withlongitudinal flanges, bolts passing through the said flanges to hold theclamp halves together, a ferrule surrounding the upper ends of the clamphalves, and a spring in the mandrel and pressing downwardly on the ropeClamp.

In witness that I claim the foregoing, l have hereunto subscribed myname this 13th day of October, 1910.

ROSE LOUISE JARVIS, AcZmz'm'sz/mtrz' 0 f the estate 0f Herbert L.

J arm's, inventor, deceased. lWitnesses E. L. FOSTER, G. B. HOWELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

